package com.estar.assistsurvy.widget;

import android.content.Context;
import android.content.res.Resources;
import android.graphics.Color;
import android.graphics.Typeface;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.RoundRectShape;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.ViewParent;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.DecelerateInterpolator;
import android.widget.FrameLayout;
import android.widget.TabWidget;
import android.widget.TextView;

public class BadgeView extends TextView {
	public static final int POSITION_TOP_LEFT = 1;
	public static final int POSITION_TOP_RIGHT = 2;
	public static final int POSITION_BOTTOM_LEFT = 3;
	public static final int POSITION_BOTTOM_RIGHT = 4;
	public static final int POSITION_CENTER = 5;

	private static final int DEFAULT_MARGIN_DIP = 5;
	private static final int DEFAULT_LR_PADDING_DIP = 5;
	private static final int DEFAULT_CORNER_RADIUS_DIP = 8;
	private static final int DEFAULT_POSITION = POSITION_TOP_RIGHT;
	private static final int DEFAULT_BADGE_COLOR = Color.parseColor("#CCFF0000"); //Color.RED;
	private static final int DEFAULT_TEXT_COLOR = Color.WHITE;

	private static Animation fadeIn;
	private static Animation fadeOut;

	private Context context;
	private View target;

	private int badgePosition;
	private int badgeMarginH;
	private int badgeMarginV;
	private int badgeColor;

	private boolean isShown;

	private ShapeDrawable badgeBg;

	private int targetTabIndex;

	public BadgeView(Context context) {
	this(context, (AttributeSet) null, android.R.attr.textViewStyle);
	}

	public BadgeView(Context context, AttributeSet attrs) {
	this(context, attrs, android.R.attr.textViewStyle);
	}

	/**
	     * Constructor -
	     * 
	     * create a new BadgeView instance attached to a target {@link android.view.View}.
	     *
	     * @param context context for this view.
	     * @param target the View to attach the badge to.
	     */
	public BadgeView(Context context, View target) {
	this(context, null, android.R.attr.textViewStyle, target, 0);
	}

	/**
	     * Constructor -
	     * 
	     * create a new BadgeView instance attached to a target {@link android.widget.TabWidget}
	     * tab at a given index.
	     *
	     * @param context context for this view.
	     * @param target the TabWidget to attach the badge to.
	     * @param index the position of the tab within the target.
	     */
	public BadgeView(Context context, TabWidget target, int index) {
	this(context, null, android.R.attr.textViewStyle, target, index);
	}

	public BadgeView(Context context, AttributeSet attrs, int defStyle) {
	this(context, attrs, defStyle, null, 0);
	}

	public BadgeView(Context context, AttributeSet attrs, int defStyle, View target, int tabIndex) {
	super(context, attrs, defStyle);
	init(context, target, tabIndex);
	}


	private void init(Context context, View target, int tabIndex) {

	this.context = context;
	this.target = target;
	this.targetTabIndex = tabIndex;

	// apply defaults
	badgePosition = DEFAULT_POSITION;
	badgeMarginH = dipToPixels(DEFAULT_MARGIN_DIP);
	badgeMarginV = badgeMarginH;
	badgeColor = DEFAULT_BADGE_COLOR;

	setTypeface(Typeface.DEFAULT_BOLD);
	int paddingPixels = dipToPixels(DEFAULT_LR_PADDING_DIP);
	setPadding(paddingPixels, 0, paddingPixels, 0);
	setTextColor(DEFAULT_TEXT_COLOR);

	fadeIn = new AlphaAnimation(0, 1);
	fadeIn.setInterpolator(new DecelerateInterpolator());
	fadeIn.setDuration(200);


	fadeOut = new AlphaAnimation(1, 0);
	fadeOut.setInterpolator(new AccelerateInterpolator());
	fadeOut.setDuration(200);

	isShown = false;

	if (this.target != null) {
	applyTo(this.target);
	} else {
	show();
	}

	}


	@SuppressWarnings("deprecation")
	private void applyTo(View target) {

	LayoutParams lp = target.getLayoutParams();
	ViewParent parent = target.getParent();
	FrameLayout container = new FrameLayout(context);

	if (target instanceof TabWidget) {

	// set target to the relevant tab child container
	target = ((TabWidget) target).getChildTabViewAt(targetTabIndex);
	this.target = target;

	((ViewGroup) target).addView(container, 
	new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

	this.setVisibility(View.GONE);
	container.addView(this);

	} else {

	// TODO verify that parent is indeed a ViewGroup
	ViewGroup group = (ViewGroup) parent; 
	int index = group.indexOfChild(target);

	group.removeView(target);
	group.addView(container, index, lp);

	container.addView(target);

	this.setVisibility(View.GONE);
	container.addView(this);

	group.invalidate();

	}

	}

	/**
	     * Make the badge visible in the UI.
	     * 
	     */
	public void show() {
	show(false, null);
	}

	/**
	     * Make the badge visible in the UI.
	     *
	     * @param animate flag to apply the default fade-in animation.
	     */
	public void show(boolean animate) {
	show(animate, fadeIn);
	}

	/**
	     * Make the badge visible in the UI.
	     *
	     * @param anim Animation to apply to the view when made visible.
	     */
	public void show(Animation anim) {
	show(true, anim);
	}

	/**
	     * Make the badge non-visible in the UI.
	     * 
	     */
	public void hide() {
	hide(false, null);
	}

	/**
	     * Make the badge non-visible in the UI.
	     *
	     * @param animate flag to apply the default fade-out animation.
	     */
	public void hide(boolean animate) {
	hide(animate, fadeOut);
	}

	/**
	     * Make the badge non-visible in the UI.
	     *
	     * @param anim Animation to apply to the view when made non-visible.
	     */
	public void hide(Animation anim) {
	hide(true, anim);
	}

	/**
	     * Toggle the badge visibility in the UI.
	     * 
	     */
	public void toggle() {
	toggle(false, null, null);
	}

	/**
	     * Toggle the badge visibility in the UI.
	     * 
	     * @param animate flag to apply the default fade-in/out animation.
	     */
	public void toggle(boolean animate) {
	toggle(animate, fadeIn, fadeOut);
	}

	/**
	     * Toggle the badge visibility in the UI.
	     *
	     * @param animIn Animation to apply to the view when made visible.
	     * @param animOut Animation to apply to the view when made non-visible.
	     */
	public void toggle(Animation animIn, Animation animOut) {
	toggle(true, animIn, animOut);
	}

	@SuppressWarnings("deprecation")
	private void show(boolean animate, Animation anim) {
	if (getBackground() == null) {
	if (badgeBg == null) {
	badgeBg = getDefaultBackground();
	}
	setBackgroundDrawable(badgeBg);
	}
	applyLayoutParams();

	if (animate) {
	this.startAnimation(anim);
	}
	this.setVisibility(View.VISIBLE);
	isShown = true;
	}

	private void hide(boolean animate, Animation anim) {
	this.setVisibility(View.GONE);
	if (animate) {
	this.startAnimation(anim);
	}
	isShown = false;
	}

	private void toggle(boolean animate, Animation animIn, Animation animOut) {
	if (isShown) {
	hide(animate && (animOut != null), animOut);
	} else {
	show(animate && (animIn != null), animIn);
	}
	}

	/**
	     * Increment the numeric badge label. If the current badge label cannot be converted to
	     * an integer value, its label will be set to "0".
	     * 
	     * @param offset the increment offset.
	     */
	public int increment(int offset) {
	CharSequence txt = getText();
	int i;
	if (txt != null) {
	try {
	i = Integer.parseInt(txt.toString());
	} catch (NumberFormatException e) {
	i = 0;
	}
	} else {
	i = 0;
	}
	i = i + offset;
	setText(String.valueOf(i));
	return i;
	}

	/**
	     * Decrement the numeric badge label. If the current badge label cannot be converted to
	     * an integer value, its label will be set to "0".
	     * 
	     * @param offset the decrement offset.
	     */
	public int decrement(int offset) {
	return increment(-offset);
	}

	private ShapeDrawable getDefaultBackground() {

	int r = dipToPixels(DEFAULT_CORNER_RADIUS_DIP);
	float[] outerR = new float[] {r, r, r, r, r, r, r, r};
	        
	RoundRectShape rr = new RoundRectShape(outerR, null, null);
	ShapeDrawable drawable = new ShapeDrawable(rr);
	drawable.getPaint().setColor(badgeColor);

	return drawable;

	}

	private void applyLayoutParams() {

	FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

	switch (badgePosition) {
	case POSITION_TOP_LEFT:
	lp.gravity = Gravity.LEFT | Gravity.TOP;
	lp.setMargins(badgeMarginH, badgeMarginV, 0, 0);
	break;
	case POSITION_TOP_RIGHT:
	lp.gravity = Gravity.RIGHT | Gravity.TOP;
	lp.setMargins(0, badgeMarginV, badgeMarginH, 0);
	break;
	case POSITION_BOTTOM_LEFT:
	lp.gravity = Gravity.LEFT | Gravity.BOTTOM;
	lp.setMargins(badgeMarginH, 0, 0, badgeMarginV);
	break;
	case POSITION_BOTTOM_RIGHT:
	lp.gravity = Gravity.RIGHT | Gravity.BOTTOM;
	lp.setMargins(0, 0, badgeMarginH, badgeMarginV);
	break;
	case POSITION_CENTER:
	lp.gravity = Gravity.CENTER;
	lp.setMargins(0, 0, 0, 0);
	break;
	default:
	break;
	}

	setLayoutParams(lp);

	}


	/**
	     * Returns the target View this badge has been attached to.
	     * 
	     */
	public View getTarget() {
	return target;
	}


	/**
	     * Is this badge currently visible in the UI?
	     * 
	     */
	@Override
	public boolean isShown() {
	return isShown;
	}


	/**
	     * Returns the positioning of this badge.
	     * 
	     * one of POSITION_TOP_LEFT, POSITION_TOP_RIGHT, POSITION_BOTTOM_LEFT, POSITION_BOTTOM_RIGHT, POSTION_CENTER.
	     * 
	     */
	public int getBadgePosition() {
	return badgePosition;
	}


	/**
	     * Set the positioning of this badge.
	     * 
	     * @param layoutPosition one of POSITION_TOP_LEFT, POSITION_TOP_RIGHT, POSITION_BOTTOM_LEFT, POSITION_BOTTOM_RIGHT, POSTION_CENTER.
	     * 
	     */
	public void setBadgePosition(int layoutPosition) {
	this.badgePosition = layoutPosition;
	}


	/**
	     * Returns the horizontal margin from the target View that is applied to this badge.
	     * 
	     */
	public int getHorizontalBadgeMargin() {
	return badgeMarginH;
	}

	/**
	     * Returns the vertical margin from the target View that is applied to this badge.
	     * 
	     */
	public int getVerticalBadgeMargin() {
	return badgeMarginV;
	}


	/**
	     * Set the horizontal/vertical margin from the target View that is applied to this badge.
	     * 
	     * @param badgeMargin the margin in pixels.
	     */
	public void setBadgeMargin(int badgeMargin) {
	this.badgeMarginH = badgeMargin;
	this.badgeMarginV = badgeMargin;
	}

	/**
	     * Set the horizontal/vertical margin from the target View that is applied to this badge.
	     * 
	     * @param horizontal margin in pixels.
	     * @param vertical margin in pixels.
	     */
	public void setBadgeMargin(int horizontal, int vertical) {
	this.badgeMarginH = horizontal;
	this.badgeMarginV = vertical;
	}

	/**
	     * Returns the color value of the badge background.
	     * 
	     */
	public int getBadgeBackgroundColor() {
	return badgeColor;
	}


	/**
	     * Set the color value of the badge background.
	     * 
	     * @param badgeColor the badge background color.
	     */
	public void setBadgeBackgroundColor(int badgeColor) {
	this.badgeColor = badgeColor;
	badgeBg = getDefaultBackground();
	}

	private int dipToPixels(int dip) {
	Resources r = getResources();
	float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dip, r.getDisplayMetrics());
	return (int) px;
	}
}